Open Government Portal

The map shows 3172 hydrometric stations, 1491 active and 1681 inactive, located on rivers and lakes across the country. All the stations on the map are situated in a drainage area of 200 square kilometres or more. For 1200 stations shown on the map, surface water level measurements are recorded...

Hydrology is the science concerned with the occurrence and distribution of water on and under the earth. Meteorology is the science dealing with the atmosphere and the movement of water, both as vapour and as liquid, in the air. Both sciences are concerned with the hydrologic cycle - the...

This collection is a legacy product that is no longer supported. The North American Atlas data are standardized geospatial data sets at 1:10,000,000 scale. A variety of basic data layers (e.g. roads, railroads, populated places, political boundaries, hydrography, bathymetry, sea ice and...

Contained within the 3rd Edition (1957) of the Atlas of Canada is six maps that show the humidity and fog occurrences across Canada. Two maps on the top that show the mean mixing ratios for January and July, respectively. Mixing ratio is defined as the ratio of the mass of the water vapor to the...

Contained within the 3rd Edition (1957) of the Atlas of Canada is a plate that shows two maps for the annual total precipitation. Annual precipitation is defined as the sum of rainfall and the assumed water equivalent of snowfall for a given year. A specific gravity of 0.1 for freshly fallen snow...

Contained within the 5th Edition (1978 to 1995) of the National Atlas of Canada is a map that shows vulnerability of soils and bedrock to acid precipitation using low, moderate and high sensitivity classes. The table covers sensitivity of water areas and the small map shows pattern of sulphate...

This collection is a legacy product that is no longer maintained. Users of Atlas of Canada National Scale Data 1:15,000,000 (release of May 2017) should plan to make the transition towards the new CanVec product.
The Atlas of Canada National Scale Data 1:15,000,000 Series consists of boundary,...

This collection is a legacy product that is no longer maintained. Users of Atlas of Canada National Scale Data 1:1,000,000 (release of May 2017) should plan to make the transition towards the new CanVec product.
The Atlas of Canada National Scale Data 1:1,000,000 Series consists of boundary,...

This collection is a legacy product that is no longer maintained. Users of Atlas of Canada National Scale Data 1:5,000,000 (release of May 2017) should plan to make the transition towards the new CanVec product.
The Atlas of Canada National Scale Data 1:5,000,000 Series consists of boundary,...